CVE-2026-114473

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Source
https://cve.org/CVERecord?id=CVE-2026-114473
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-114473.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-114473
Published
2026-10-21T15:12:05Z
Modified
2026-10-22T02:48:51Z
Severity
  • 5.0 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N CVSS Calculator
Summary
Incorrect Authorization in hMailServer
Details

Incorrect authorization in the Sender Rewriting Scheme (SRS) of Progressive Robot hMailServer 6.2.1 through 6.3.6 allows a remote attacker to relay mail through the server to outside addresses. With SRS enabled, the server rewrites the envelope sender of mail it forwards to a signed SRS address at the forwarding domain, and passes a bounce to that address back to the original sender; but it took every message to a valid SRS address, whatever its sender, as delivery to a local recipient, so the relay rules and the SMTP authentication they require were not applied, and the message was delivered to the outside address the SRS address encodes. Anyone holding a valid SRS address of the server, such as the recipient of a forwarded message, could have the server relay mail to the address it encodes for 21 days, and an account holder whose account forwards to an outside mailbox could obtain one for any address. SRS is off by default.

Database specific 
{
    "cna_assigner":  "GitLab",
    "cwe_ids":  [
        "CWE-863"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114473.json"
}
References

Affected packages

Git / gitlab.com/hmailserver/hmailserver

Affected ranges

Type
GIT
Repo
https://gitlab.com/hmailserver/hmailserver
Events
Introduced
d0b9ded8bb758b277abdb906e5cdd6c067a77774
Last Affected
e3c448aa66fc310b74d076884d54fae951296915
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "6.2.1"
                },
                {
                    "last_affected":  "6.3.6"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        }
    ]
}

Affected versions

Other
build-inputs-1
v6.*
v6.2.1
v6.2.10
v6.2.11
v6.2.12
v6.2.13
v6.2.14
v6.2.15
v6.2.16
v6.2.17
v6.2.18
v6.2.19
v6.2.2
v6.2.20
v6.2.21
v6.2.22-pre1
v6.2.22-pre2
v6.2.22-pre3
v6.2.22-pre4
v6.2.22-pre5
v6.2.22-pre6
v6.2.23-alpha1
v6.2.23-alpha2
v6.2.24
v6.2.25
v6.2.26
v6.2.27
v6.2.28
v6.2.3
v6.2.4
v6.2.5
v6.2.6
v6.2.7
v6.2.8
v6.2.9
v6.3.0
v6.3.1
v6.3.2
v6.3.3
v6.3.4
v6.3.5
v6.3.6

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-114473.json"